1. 19 is what percent of 40
a. 19=n x 40;47.5%
b. 40=19 x n;2.1%
c. 40=19 x n;40.4%
d. 19=n x 40;52.3%
is it a?
2.64 is 80% of what?
a.64 x n=80; 0.8
b.0.64 x n=80; 125
c.60= 0.80 x n;80
d.80=64 x n;1.3
is it c?
Yes for both. Good job.
yes they are both correct the way you have them.
1a is correct.
0.8*n = 64
n = 80
You wrote the problem wrong in 2c. 60 should be 64
To find the answer to these questions, we need to understand how to calculate percentages.
1. To find out what percent 19 is of 40, we can use the formula: (part/whole) x 100.
So, in this case, it would be (19/40) x 100.
Evaluating the options:
a. 19 is equated to n multiplied by 40. This does not represent the percentage calculation.
b. 40 is equated to 19 multiplied by n. This does not represent the percentage calculation.
c. This option correctly represents the percentage calculation, as 40 is equated to 19 multiplied by n.
d. 19 is equated to n multiplied by 40. This does not represent the percentage calculation.
Therefore, the correct answer is option c: 40 = 19 x n. This gives us the percentage of 19 out of 40 as 47.5%.
2. To find out what 80% of a number is, we can multiply the number by 0.8.
Evaluating the options:
a. 64 multiplied by n equals 80. This does not represent the calculation of 80% of a number.
b. 0.64 multiplied by n equals 80. This does not represent the calculation of 80% of a number.
c. 60 equals 0.80 multiplied by n. This does correctly represent the calculation of 80% of a number.
d. 80 equals 64 multiplied by n. This does not represent the calculation of 80% of a number.
Therefore, the correct answer is option c: 60 = 0.80 x n. This means that 80% of the number is 60.